Pumping apparatus



y 1932. F. H. LEWIS 1,857,922

PUMPING APPARATUS Filed March 25, 1930 2 Sheets-Sheet 1 l N VEN TOR.

Frank H. Lewis I! ATTORNEY.

May 10, 1932. F. H. LEWIS PUMPING APPARATUS Filed March 25, 19350 2 Sheets-Sheet 2 Q Q O0 5 O O. o H w h c wm w o W Q m INVENTOR. Frank H. Lewis ATTORNEY.

Patented May 10, 1932 UNITED STATES PATENT oF cE FRANK H. LEWIS, or SAN JOSE, eALIronNIiA, Assiernon "r0 noon MACHINERY COR- POR-ATION, OF SAN JOSE, CALIFORNIA, a CORPORATION, or DELAWARE PUMPING ArrAn rus Application filed March 2 5, 1830; Serial K01 438310.

This invention relates to pumping appara tus, and has more particular reference to a novel association of such apparatus with the driving means therefor.

Apparatus for spraying fruit trees generally comprises a reservoir for spray material, and a pump which draws the liquid therefrom, and forces it to a nozzle, from the spraying season, with consequent heavy strain and wear on the parts. The result has been that when replacement of worn parts became necessary, the entire apparatus had to be shut down, thus wasting valuable time.

This invention has for an object, the construction of a pumping system, whereby when it becomes necessary to shut down any portion of the system, the remainder may continue in operation, and embodies a novel driving means therefor, which is simple, compact and well-balanced.

It is a further object to provide a pumping system, which is efficient, economical to manufacture, and thoroughly dependable in operation.

Other objects and advantages will be ap parent as the description proceeds. The i11- vention will be more clearly understood in connection with the accompanying drawings, in which:

Fig. 1 is a side elevation of an apparatus, embodying myinvention; and Fig. 2 is a plan view thereof.

The apparatus shown comprises a suitable 'base 1, upon which are mounted two pumps 2, identical in construction, each having three cylinders in which operate pistons, not shown, which are driven by the pit-men 3. from the eccentric shaft 4, by the eccentrics 5.

Each cylinder is provided with the customary inlet and discharge valves 6 and 7,

whereby spraying fluid is drawn from the main supply pipe 8, and discharged to the main discharge pipe 9. I Each pump delivers to,the main pipe 9, through an individual discharge pipe 10, provided with a pressure regulating mechanism 11; Said regulating mechanism is oldand well-known, and furfher description is believed to be unnecessary iere. l Y Also mounted upon the frame 1, and to one side of the pumps, is an electric motor 12, whose armature shaft is indicated at 13. 0 This sh'aft isextended at each end, and carries the pinions lfl thereon, which mesh with the silcntchains 15, thereby driving the gears 16, which are aflixed to the eccentric shafts 4.

It is thus apparent that should circum- 5 stances require the discontinuance of one pump, the other could still operate, thus obviating the necessity of shutting down the entire assembly; also when only limited capacity is needed,one pump can be disconnected from the motor, thus allowing the remaining pump to operate alone.

Moreover, it is also possible that with suit able modification', which will be obvious to one skilled in the art, the two pumps can be 7 driven simultaneously for the performance of different functions.

Having thus described my invention, I wish it to be understood that I do not limit myself to the exact details of the construction shown, 50 but consider myself entitled to all changes and modifications which fall within the-scope of the appended claims.

WhatI claim is 1. In a pumping system, two pumps con- 35 nected in parallel and having independent drive shafts, a motor provided with an extended shaft andremovable drive means connecting each pump shaft with an end of said motor shaft.

2. In a pumping system, two pumps connected in parallel and'having independent drive shafts,.an electric motor having an armature shaft, said shaft being provided 7 with power take off means at each end thereof and flexible drive means, connecting each pump'shaft with one of said power take offmeans. t v

3. A unit spray device comprising a base member, a single power means and a plurality of pump means connected in parallel and having independent drive shafts mounted on said base member, separate power transmission means connecting the shaft of each of said pump means with said single power means a sounce-ofispray materialvunderinormal pnessur eiconnected with said pump-means and conducting means for conveyingspray material from said creased pressure;

4. A unit spraydevice comprisinga'smgle' pump means under in I power source a plurality of independently operated pressure pumping elements, each element having independent operating. con-J nection with said single power source, a single source. of spray: material connected to said plurality of. pumping elements; anda single source means for conveying spray material; from: said plurality of: pumping elements;

5. In. a pumpingsystem, two pumps.con.-: nectedin; parallel andhaving separate drive shafts, a motor provided with an extended shaft, and removable-driving means-connecting the end; of each: pump; shaft with an; end.

of .the motor shaft;

Signed at San Jose this 12-day of March;

FRANK H MLEWISL 

